Designer: obverse: Arnold Machin; reverse: Stuart Devlin
Reference: KM# 64
Diameter: 19.4 mm
Reverse In the central part -- an image of a sitting echidna and a large numeral 5. Below is the inscription 'SD' — the engraver's mark of Stuart Devlin.
Obverse In the left part, along the edge of the coin, the English text 'ELIZABETH II', which translates to 'Elizabeth II'. On the right – the country name Australia and the year of minting 'AUSTRALIA 1984'. In the central part, the right-facing profile of Queen Elizabeth II.